Otp Issue

Hi guys im a loyal customer of standard bank but im honestly fed up with the service and issue for a otp code i been to the bank for the last 3 months just to change a cellphone number to receive a otp pin on my new number but it still goes to my old phone number which doesn't exist anymore and every time i go to the bank there state my problem has been rectified but until now i still don't have access to my internet/cell phone banking nothing can't do payments nothing all because of a otp pin and cellphone number if this is not fixed im surely closing down my standard bank account and moving to fnb as i already have a account with them and let me tell you excellent service not like This were i can't even access my own funds please get back to me or email me ***